ML19263E538
| ML19263E538 | |
| Person / Time | |
|---|---|
| Site: | Columbia, Washington Public Power Supply System, Satsop  |
| Issue date: | 05/29/1979 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Strand N WASHINGTON PUBLIC POWER SUPPLY SYSTEM |
| References | |
| NUDOCS 7906200061 | |
| Download: ML19263E538 (1) | |
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VlA t N U I Cf:1 E K. Calli CI::JI A 94 T f*ey 29, 1979 Docket lios. 50-397, 50-460 50-513, 50-503 50-509 Washington Puolic Power Supply System P. O. Box 968 3000 George '<!ashington Way Richland, Washingtoa 99352 Attention:
fir. il. O. Strand IIdnaging Director Gentlemen:
This Informtion flotice is provided as an early r.otification of a possibly significani. tatter.
It is expected that recipients will review the information for possible applicability to their facilities.
Ito specific action or response is requested at this tir..e.
If further I;RC evaluations so indicate, an IE Circular or Bulletin.1111 be issued to recon.end or request specific licensee actions.
If you have questions regarding the matter, please contact the Director cf the appropriate i!RC Regional Office.
Sincerely, I
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Enclosure:
IE Information !!otice ll0. 79-13 cc w/ enclosures:
fi. E. Witherspoon, WPPSS 2288 246 A. D. Kohler,llPPSS J. P. Thomas. WPPSS U. J. Talbott, llPPSS 7 9 0 6 20 0 0 co I G. C. Sorensen, WPPSS
UNITED STATES I;UCLEAR REGUL/,T03Y COMMISSION OFFICE OF INSPF. ION AND ENFORCEMENT WASHI!!Pl uN, D.C.
20555 May 29, 1979 IE Information Notice No. 79-13 INDICATION OF LOW WATER LEVEL IN THE OYSTER CREEK REACTOR Surlary A loss of feedwater transient at the Oyster Creek facility on May 2,1979, resulted in a significant reduction in water inventory within the reactor core shroud area as measured by one set of water level instruments (triple low level), while the reraaining level instruments, sensing from the reactor annulus area indicated water levels above any protective feature setpoint (Figure 1).
The water level within the core shroud area was reduced below the " triple icw level" setpoint of 4-fect, 8-inches above the top of the fuel.
Subsequerit analysis by the licensee has determined that the minimum collapsed water level (solid, without steam voids) over the top of the fuel was 1 to 1-1/2 feet.
Coolant saicple analyses and offgas release rates ir,dicate that no fuel damage occurred.
General Oyster Creek is a non-jet pump BWR with licensed power of 1930 MWt. The plant was first made critical May 3,1969.
Status Before Transient Operating at near full power with the raain parameters at levels as follows:
1895 MWt power level 79" Yarway (13'4" over top of fuel) reactor water level 1020pgigreactorpressure 7.1x10 #/hr feed flow 4
14.8x10 gpm recirculation flow rate (4 pumps) 12 psid coreapg@ 24J Equipment Out of Service (005' "D" recirc pump 005 due to se, "B" startup transformer 00S f DUPLICATE DCCUMENT Entire document previously entered into system under: b. ANO No. of pages: /[}}